Pipe threading apparatus



Aug. 3,, 1954 Filed March 12, 1952 C- L. BUTLER PIPE THREADING APPARATUS4 Sheets-Sheet 1 Charles L. Bur/er INVENTOR.

MM PM Aug. 3, 1954 Filed March 12, 1952 C. L. BUTLER PIPE THREADINGAPPARATUS 4 Sheets-Sheet 2 Charles L. Bur/er INVENTOR.

BY w mz Aug. 3, 1954 c. 1., BUTLER PIPE THREADING APPARATUS 4Sheets-Sheet 3 Filed March 12, 1952- Charles L. But/er 1954 c. BUTLERPIPE THREADING APPARATUS 4 Sheets-Sheet 4 Filed March 12, 1952 Charles LBut/er INVENTOR.

Patented Aug. 3, 1954 PIPE THREADIN G APPARATUS Charles L. Butler,Dallas, Tex, assignor of twelve per cent to Donald E. Saifell and twelveand one-half per cent to Louise B. Saffell, both of Dallas, Tex.

Application March 12, 1952, Serial No. 276,075

6 Claims.

This invention relates to new and useful improvements in pipe threadingapparatus and the 88 of Figure 2; and,

2 Figure 9 is an end view of Figure 8. Referring now to the drawings indetail, wherein for the purpose of illustration, there is dis closed apreferred embodiment of the present manually operated die heads, of theratchet type, invention, the numeral I0 represents an e1onto automaticmachine threading for the purpose gated base having end apertures I 2adapted to of threading pipe or rods. receive fasteners, whereby thebase may be re- Another important object of the present invenmovablysecured to a supporting structure, such tion is to provide a portablepipe threading deas a bench or rack of pickup trucks. vice adapted forattachment to and operation by A pair of spaced ears [4 are formed onthe base the pipe rack of pickup trucks, as well as benches adjacent oneend of the base and receive the and which device may be easily carriedinto lower apertured end of a rod or post [6 thereor under houses,building stiuctures or the like between. A pivot l8 extends through thelower for the threading of pipes or rods. t 1 end of rod I6 and the ears14 to permit vertical A further object of the present inven ion is 5swinging movement of the rod IS on the base It. to provide a threadingdevice that is extremely The upper end of rod I 6 enters a recess in thesmall and compact in structure and which inundersurface of one end of across-member 20. cludes a power driven die holder supported on Aninternally threaded ear 22 also depends from a carriage and having alimiter switch adapted this end of cross-member and receivably ento beengaged by an adjustable stop, whereby the 20 gages a fastener 23 thatis threaded in a recess threadin operation may be arrested autoin theupper end of the rod l6. matically. The other end of cross-member 20 isformed A still further aim of the present invention is with an ear 24that extends into the bifurcated to provide a threading apparatus forpipes, rods upper end of a latch member 26. A pivot pin 28 and the likethat is simple and practical in con- 25 extends through the bifurcatedend of latch struction, strong and reliable in use, efiicient and member26 and the ear 24. A lip 30 on the base durable in operation,inexpensive to manufacreceives the hook portion 32 of the latch memberture, one that may be carried, moved and cperthereunder, to hold the rod16 against pivotal ated by only one man, and otherwise well adaptedmovement. for the purposes for which the same is intended. 3 The lowerend of a second rod 34 is positioned Other objects and advantages ieside1n the in a recess in the base and the rod 34 extends details ofconstruction and operation as more upwardly from the base and into arecess in ful y hereinafter described and claimed referthe undersurfaceof the cross-member 20 adence being had to the accompanying drawi gsjacent the latch member 26. A relatively small i ifi pi 'izk l l g i i hf il refer 35 internally threaded ear 36 depends from cross- 0 epar W1011 W 10 3 member 20 adjacent the upper end of rod 35 Figure 1 15 aside elevational view of the present and receivably engages a fastener33 that threadinvention in use; ingly enters a transverse recess in therod 34.

Figure 2 a plan View of Flgure 40 Cross-member 2B is provided with acentral, int i i z ff a g ternally threaded hole '40 that receivablyengages ggg ggfi g g g g i z f on e p am 0 a feed screw 42 whose upperend carries a hand .L Figure 4 is an enlarged transverse vertic g 2 22;$2 55? rinv:i lo l 1 1;1 0 imgggtggg sectional view taken substantiallyon the plane of Section line of Figure gripper 48 that faces a sectionalV-shaped sta- Figure 5 is a vertical Sectional View taken i izi'onar lii1 gripper 50 mounted in a transverse saddle stantially on the plane ofsection line 5-5 of Zen ebase' Figure I The outwardly turned verticallyapertured ends Figure 6 is a group perspective View of the 54 of aU-shaped brace 56 receive the rods l6 and limiter Switch abutment; 34 toretain the rods parallel to each other. The Figure 7 is a perspectiveView of the locking 50 brace 56 is centrally apertured to receive screw42 means fgr retaining the carriage on the guide the aperture beingsmooth or unthreaded to perrods therefor; mit vertical movement of thescrew 42 without Figure 8 is an enlarged vertical sectional vieweffecting movement of the brace. taken substantially on the plane ofsection line 55 Ends 54 of brace 55 are provided with horizontalrecesses in which a pair of spaced parallel horizontal guide rails orbars 58 are suitably held. The ends of the rails 58 remote from the baseH! are provided with key shaped blind bores 60 that releasably receivethe key shaped shanks 62 of stop members or butt-keys 64.

A carriage 66 is slidably received on the guide rails 58 for movementtoward and away from the base l0. Carriage 66 includes a pair of easingforming members 68 that are removably secured together. The members 68are formed with diametrically opposed ears that slidably receive theguide rails.

The carriage 65 also includes a horizontal motor mounting plate 12 onwhich a reversible electric motor 14 is suitably mounted. A gear box 16on the plate 12 receives the armature shaft 18 of the motor and a worm80 fixed on shaft 18. A gear 82 rotatably in box 16 meshes with worm 8Band also meshes with a pinion 84 between casing forming members 68.

The members 68 are provided with registering openings 86 that rotatablysupport a sleeve 88 having a ring gear 90 fixed thereon. Gear 90 isinterposed between the members 68 and meshes with the pinion 86. It isnoted that the opening in gear 90 is formed with circumferentiallyspaced fiat portions corresponding to circumferentially spaced flatportions on the sleeve 85;, whereby sleeve 88 and ring gear 96 rotate asa hit.

A tube 92 is fixed to sleeve 88 about an aperture 945 in the sleeve. Aplunger 95 is slidably carried by a cap 98 threaded to the tube andextends through aperture 94. A shoulder I063 on the plunger is urgedagainst the sleeve 88 by a coil spring [[32 that embraces the plungerand which is biased between the shoulder I90 and the cap 98.

Motor 14 is provided with the usual switch 104 whereby the motor shaftmay be rotated clockwise or counterclockwise or the circuit to the motoropened. The motor 14 is also provided with a limiter switch H16 havingan operating arm I03.

Stop means is provided for the carriage in the form of an abutment forthe arm I08 of the limiter switch I06. This stop means comprises acollar ill] slidably received on one of the guide rails. A set screw H2threaded through the collar will engage the rail on which the collar isslidably received to adjust the collar longitudinalr ly on the rail.

A tubular post H4 extends upwardly from the collar l l6 and its upperend is formed with a vertical slot H6 having a lower offset portion H8.The transverse cylindrical head portion I of a stop rod I22 is receivedin the upper end of post l M and the rod I22 is moved downwardly in slotMB to enter portion H8 thereof at which time rod I22 will parallel theguide rails and be disposed in the path of the arm I08.

Scale markings or graduations are provided on the rail slidablyreceiving the collar Hi1 so that the length of a pipe P to be threadedmay be readily determined.

In practical use of the present invention a die (not shown) isreleasably secured in the sleeve 88 and the collar H0 is adjusted to thedesired length of thread out by tightening set screw H2 in alongitudinal groove I24 in the graduated rail 58.

Latch member 26 is removed from lip 39 and cross-member 20 swung back onpivot Hi to permit pipe P to be placed on jaws 50. Cross-member 20 isthen lowered and latch member 26 engaged with lip 30. Screw 42 is nextlowered until jaw 48 engages the pipe to clamp the pipe between jaws 48and 50.

Switch H14 is manually actuated to place its button in its forwardposition whereupon the die engaged with the end of pipe P remote frombase It will be driven to cut threads in the pipe and also move thecarriage 66 toward the base. Movement of the carriage continues untilrod I22 is engaged by arm I08 whereupon the circuit to the motor will bebroken.

The ends 54 of the brace 56 carry set screws that engage the rods 16 andM to permit vertical adjustment of the brace and the rails 58 supportedthereon, whereby the device is adjustable to pipes of various diameters.

To remove the die head from the pipe, the switch W4 is placed in areverse position and arm 122 is swung to a position at right angles tothe guide rails to permit closing of switch 166. Then, the motor willrotate counterclockwise thus reversing rotation of the die or dies andunscrewing them from the pipe. The switch IE4 is manually urged to itscircuit open position to arrest operation of the motor.

Cross-member 2c is then tilted by backing up on screw 42 and disengaginglatch member 26 from lip 39 and the pipe raised from jaw 5. The pipe mayalso be withdrawn from the rear of the vise 48, 50 without having totilt cross-member 23 provided the next pipe to be threaded issubstantially the same diameter as that in which the threads werepreviously cut.

Obviously if left hand threads are to be cut in the pipe the dies usedwill be left handed and the switch EM will be placed in reversedesignation for the threading of the pipe counterclockwise and switch184 will be placed in a forward designation for removal of the dies fromthe pipe, clockwise.

For the threading of one end of a length of pipe when the opposite endis in a fixed position and can not be removed from its connection atthat end, such as an underground pipe, the guide end of a die head,containing the proper dies for the diameter of the pipe is first placedwithin the dies stock or sleeve 88. The vice including the base areclamped on the pipe and the steps previously outlined above followed tocut threads in the pipe for a predetermined length.

Having described the invention, claimed as new is:

1. A pipe threading machine comprising a base, a pair of parallelhorizontal guide rails vertically adjustable supported relative to thebase and projecting outwardly therefrom, means carried by the base forclamping pipes of relatively different diameters thereto in parallelrelation with the guide rails, a carriage slidably supported on therails and vertically adjustable thereby, and a power driven dierotatably supported by the carriage and vertically adjustable therebyinto axial alignment with the pipes of different diameters for engagingand cutting threads in a pipe held by said means and thereby causingmovement of the carriage along the rails and toward the base.

2. A pipe threading machine comprising a base, clamping means carried bythe base for clamping pipes of relatively different diameters theretoand including a pair of posts, a pair of horizontal guide railsvertically adjustably carried by said posts, a carriage slidablysupported on the rails and vertically adjustable thereby, a pipe threadcutting die rotatably supported on the carriage and verticallyadjustable thereby what is into axial alignment with the pipes ofdifferent the base and also secured to the other end of the therebycausing movement of the carriage on of the cross-member and theswingable bar about the guide rails toward the base, an electric motor 5the pivo of the swingable bar, a brace vertimounted on the carriage andoperatively concally slidably adjustably received on the bars nected tosaid die for rotating the same, said and supporting the guide rails, andsaid means mounted on one of said rails in the path of move- 10 ablycarried by the brace.

ment of the operator arm for engaging said arm 6. A pipe threadingapparatus comprising a to move the switch to its circuit open positionbase i g m n thereon for clampingly das the carriage is moved towardsaid stop means. ing a pipe in a horizontal DOSilJiOIl, a p 0f 3. Thecombination of claim 2 wherein said spaced par llel h ri n l guide r l arr ably received on said one rail, a post fixed to and and away from thebase, a d (h means up- IlSlIlg from said collar, and a horizontalactuator p r d on the rn e f r u in hr d in a rod detachably secured tosaid post and parallelpipe held on said base and for moving the ceningsaid rails and located in the path of movellage n he lls as the the cutsthreads in a ment of said arm. p pe, said means for clampingly holding apipe 4. The combination of claim 3 wherein said mpri i a r -m m r h vione n p vpost comprises a tube having a vertical slot in tfl y h d tothe base, latch means at the its upper end including an offset lower endporother end of said cross-member releasably ention, said rod includingan enlarged cylindrical g g the base, a P r of Posts Carried y Said endportion, pressure element carried by the cross-member 5. A pipethreading machine comprising a nd a pip seat s u ed to th ase nd opp nbase, a pair of parallel guide rails vertically adlLll'le p e ment.

ustably supported relative to the base and p1 ojecting outwardlytherefrom, means carried by References Cited in the file of this PatentUNITED STATES PATENTS supported on the rails, and a power driven die Nmbe Name Date releasably supported by the carriage for engag- 35Henderer pt. 2 1904 ing and cutting threads in a pipe held by said944,534 Treadwell 0 means and thereby causing movement of the 1,005,965Hart Oc 17, 1911 carriage along the rails and toward the base, 3 3HodeauX p 5, 1932 said means comprising a vertically swingable bar2,219,944 301106106 9, 940 pivoted to the base, a cross-member havingone 40 2,314,016 t rs Mar. 16, 1943 end secured to the bar, a second barsecured to $576,114 Hibbard 7, 9

